How can I plot multiple signals with unit step signal
조회 수: 3 (최근 30일)
이전 댓글 표시
I need to plot this function:
v(t)=(2t+1)[u(t)-u(t-1)]+3[u(t-1)-u(t-2)]+(-t+3)[u(t-2)-u(t-3)]
댓글 수: 0
채택된 답변
Azzi Abdelmalek
2013년 11월 15일
t=-5:0.1:5
v=(2*t+1).*(heaviside(t)-heaviside(t-1))+3*(heaviside(t-1)-heaviside(t-2))+(-t+3).*(heaviside(t-2)-heaviside(t-3))
plot(t,v,'linewidth',4)
추가 답변 (1개)
Wayne King
2013년 11월 15일
편집: Wayne King
2013년 11월 15일
Looks to me like this just simplifies to:
\delta(t) +3\delta(t-1) + \delta(t-2)
N = 128;
sig = zeros(N,1);
idx = 1:3;
sig(idx) = [1 3 1];
stem(sig)
u(t)-u(t-1) is like the derivative of the unit step at t, which is the delta function (distribution)
You can see it's equal if you implement your equation above using the differences of the translated unit step functions:
stepfunc = ones(128,4);
stepfunc(1,2) = 0;
stepfunc(1:2,3) = 0;
stepfunc(1:3,4) = 0;
t = (0:127)';
v1 = 2*t+1;
v2 = -t+3;
v = v1.*(stepfunc(:,1)-stepfunc(:,2))+ 3*(stepfunc(:,2)-stepfunc(:,3))+...
v2.*(stepfunc(:,3)-stepfunc(:,4));
subplot(211)
stem(v)
subplot(212)
stem(sig)
댓글 수: 2
참고 항목
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!